Electric lamp.



CLP. STEINMETZ.

ELECTRIC LAMP.

APPLICATION FILED MAY 9, 1904.

1&9 1 7150 Patented. Ma1131, 19m.

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AHMQMTQR: ChnrlesPSteinmet;

G. P. STEINMETZ.

ELECTRIC LAMP.

APPLICATION FILED MAYQ, 1904.

Patented Mar. 31, 1914.

3 SHEETS-SHEET 2.

INVENTOR Charles I? S'Ee i nmetz,

ify

WITME 5E5:

0'. P. STEINMETZ. ELECTRIC LAMP. APPLICATION FILED MAYQ, 1904.

1 @@1 715@ Patented Mar. 31, 19M.

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INVGHTOR Charle s I? Steinmefiz;

UNITED STATES PATENT orruon;

CHARLES P.

STEINMETZ, OF SCHE-NECTADY, NEW YORK, ASSIGNOR Tn GENERAL ELECTRICCOMPANY, A CORPORATION OF NEW YORK.

ELECTRIC LAMP.

Specification of Letters Patent.

Patented Mar. 31, 191-1.

Application filed May 9, 1904. Serial No. 207.023.

To all whom it may concern:

Be it known that I, CHARLES P. STEIN- ME'rz, a citizen of the UnitedStates, residing at Schenectady, in the county of Schenectady, State ofNew York, have invented certain new and useful Improvements in ElectricLamps, of which the following is a specification.

My present invention relates to electric lamps and comprises certainimprovements whereby the radiations from sources of light of differentcolors may be so combined and intermingled as to produce a jointproduct.

In carrying out my invention I combine with the light from a mercuryvapor lamp or lamps that derived from an incandescent lamp or lamps soas to produce a resultant illumination, practically the same as that dueto white light. In order to effect the combination of lights from thesetwo sources I support the lamps within a globe of the type shown inPatent-No. 563,836 Blondell and Psaroudake, July 14, 1896, and now wellknown under the term holophane. The efit'ect of a lobe ofthis characteris to intermingle the ights from the two sources in such a manner thatthe globe appears to radiate, not the yellow light of the incandescentlamps or the greenish white light of the mercury lamp, but a light whichis a combination of the two and which by a proper relative roportion ofthe two sources approaches in c aracter ordinary day-light.

The featuresof novelty which characterize myinvention are pointed outwit. particularity in the appended claims. The invention itself,however, will be better understood by reference to the followingdescription taken in connection with the accompanying drawings, inwhich,

Flgure 1 represents, by way of illustration, one of the numerousembodiments which my invention may assume in practice. In this figurethe lamp is shown in its completed form. Fig. 2 is a-view partly incross section of the lamp, and Fig. 3 is a view of a portion of thelamp-supporting frame work.

The light-dispersing globe in electric lamps are located, ma of course,assume various forms. In t e drawing, however, the particular form shownat 1 is somewhat acorn-shaped, although in general it may be said thatthe prisms surround the lamps through a solid angle of more which thestood manner.

than 180. The upper portion of the globe is provided with a flange 2which rests on a ring 3. This ring is provided with three or more hooksas at 1, which serve as a means of engagement for supporting chains as 5and 6 whereby the lamp is suspended from any suitable point. I Themercury lamp which I locate in the globe, may, of course, be of any oneof a variety of types. One form .-however, which is found effective isshown in Fig. 2. It consists of an exhausted tube '7 inclosing suitableelectrodes such as the graphite anode 8 and the mercury cathode 9. Acarbon filament 10 extends from the anode and, when the lamp is notrunning, engages at its lower end a floating armature 11. This armatureis hollow at its top and carries mercury into which the lower end of thefilament dips.

The lamp tube 7 is surmounted by a bulb or enlargement 12 constituting acondensing chamber. .This bulb aii'ords a means for supporting theweight of the lamp, and to this end rests upon the sides of a circularopening in a plate 13 of insulating material. This plate in turn iscarried by two uprights 14 and 15 secured toa frame work shown perhapsbest in Fig. 3. In this figure it will be seen that he annulus 16 iscarried by radial arms 17, 18 and 19 secured to the ring 3. The uprights14 and 15 a1" fastened to inwardly projecting arms 20 and 21 securedtothe annulus 16. The mercury lamp is supported vertically as shown andextends down sufliciently so that the contracted portion 22-0f the lamptube projects below the end of the globe 1. I

upon the float to submerge the same." The initial are produced at thelower end of the filament 10, upon the recession of the float, operatesto start the lamp ina well-under- The solenoid 23, with its protectingcasing 24., is centered in a circular opening in the lower end of theglobe 1 and is supported by rods '25 and 26 depending from the arms 20and 21.

- A number of ordinary incandescent lamps, in this case of the co-calledbung-hole type, for example, indicated at 27, 28 and 29, are groupedabout the mercury lamp. These are supported from sockets 30, 31 and 32carried by the annulus 16. Suitable electrical connections are madewhereby the lamps operate in multiple with each other and so that thetotal current traversing the lamps flows also through the mercury lamp.The incandescent (lamps therefore serve as the steadyingpresistance forthe mercury lamp words should not be connected to an active portion ofthe circuit. To this end the arms 17, 18 and 19 should be insulated fromthe annulus 16, as for example bymeans of in.- sulating bushings 33 and34:. A similar bushing not shown is provided for the" arm 17." h

When v the apparatus is in operation the light given offfrom theincandescent lamps and the lightproduced by the mercury lamp, inpassing'through the holophane globe 1, are combined and intermingled ina manner to render their joint product far superior in illuminatingeffect to that which would exist without the use of a globeofthischaracter. In observing the globe when thus lighted up,

the individual lamps, either mercury lamps or the incandescent lamps,are not distinguishable. On the contrary, the globe appears to befilledwith a glowing light of a color neither that of the incandescentlamps nor of the mercury lamps but of a combination" of theftwo'whichclosely approaches day-light.

I may if desired surmountfthe lamp by means of a companion holophaneglobe, or if desired have a double reflecting prism reflector as at 35which reflector serves to "throw down the upwardly-extending radiationsfrom the lamps. This reflector may be carried by inwardly-projectinthumbscrews' as 36, 3'7 and 38 passingt rough an ornamental protectinhood 39 surrounding lamp. This hood may be in two parts the upper.portion ofwhich is removable if desired.

It is evident that numerous other changes may be made in the embodimentof my invention without departing from the spirit thereof, for whichreason 'I do not wish to be limited to theexact details shown anddescribed.

1 What I claim as new and desire to secure by Letters Patent of theUnited States is:

1. The combination of a prismatic glass globe, a ring for supportingsaid globe; a mercury vapor lamp, and one or more incandescent lamps inthe globe and supported from's aid ring.

2. The combinationof a globe having a flanged top, a supporting ringengaging said flange, and electric lamps of different types carried fromsaid ring. 1

3- The combination of a light-dispersing globe, a centrally located'meroury vapor lamp in said globe, incandescent lamps grouped about saidmercury vapor lamp,

and having filaments extending parallel for the greater part of theirlength with said mercury vapor lamp;

4. The combination of a globe of prismatic glass, a mercury vapor lampsupported centrally in said globe, a plurality of incandescent lampssupported in said globe around said mercury lamp, a rin support for saidglobe, and a frame-wor carried from said ring and supporting saidincandescent lamps.

In witness whereof I' have hereunto set my hand this 7th day of May,1904.

CHARLES P. STEIN METZ.

Witnesses:

BENJAMIN B; HULL, HELEN ORFono.

the condensing cham er 12 of the mercury

